Dmn Modeler - check input string length and admit only digit

BPMN & Modeling Discussion & Questions
1

Hello everyone, I would like to create conditions for 2 input string with dmn Modeler :

  1. Only string of length 3: I have tried with length(myString)!=3, length(myString)not(3) and other alternatives, unfortunately always not successful
  2. Only digits should be entered, comparatively NaN of JavaScript: I have used not(number) and other alternatives, unfortunately always not successful
    I’ve tried a lot of alternatives, but unsuccessful.
    Does anyone know how I could write these terms with dmn Modeler?
    Many thanks in advance.
2

You can check for this by using FEEL to get the length like this string length("foo")
More details are here: https://camunda.github.io/feel-scala/docs/reference/builtin-functions/feel-built-in-functions-string

You can find more details about how to use feel your use cases by checking out this Documentation

1 Like
3

Thanks for your post, i took a look of this documentation ,but no success. I don,t like to get the length of the input string, but i like to set a condition that the input string should have a length 3 like length(myString)!=3 , but what i tried does not work

4

Hi @Achille,

Try below expression
string length(?) != 3

The input value can be accessed in the expression by using the symbol ? (a question mark).

5

Thanks @hassang
I found the solutions to my problems

The inputString should have length 3
string length(inputString) !=3

The inputString should contain only character
matches(inputString, “[a-zA]”)

1 Like